Correct option is C
The compound rest is also known as a tool rest. It's a part of a lathe machine that holds the cutting tool and tool post.
The compound rest is mounted on the cross-slide of a lathe.
It's used to hold the cutting tool at the required angle.
The compound rest can be swiveled and clamped at any angle in a horizontal plane.
It's used for cutting steep tapers and angles for lathe centers.
The compound rest has a circular base with angular graduations marked on it.
